I recently discovered that the WinUI Community Toolkit has had a massive upgrade. In fact, there are all new packages on NuGet. When you are searching for them, make sure you look for the new blue icon instead of the gray one.
I've only used a couple of them so far, but they seem very stable and robust. The only major drawback I've seen is that they removed the DataGrid that was in version 2! This caught me off guard and presents a real problem as I rely on it for a project. Other than that, the new packages look promising.